When you choose a managed cloud service, you are essentially buying a promise: someone else will handle your infrastructure so you can focus on the product, allowing you to sleep soundly at night. This promise sounds great on a sales deck, but when a seasoned CTO looks at the numbers, the resulting dependency and what happens when you need to move - the picture looks completely different.
This article is based on two posts I wrote on this topic, one about the impressive shift Reddit made from the cloud to the Kubernetes they manage, and the other about the debate surrounding the justification of managed services. Both posts touched on a raw nerve, because this topic directly impacts your budget, your freedom of movement, and your ability to sleep.
The Reddit Example: Avoiding Lock-In from Day One
What Reddit did that most companies are afraid to do is move their most sensitive component from the cloud to the Kubernetes they manage without a pause in the product's operation. Most CTOs argued this was impossible, but when you look at what made it happen, you see a clear pattern starting long before the actual migration. First, they avoided managed services from day one, using only cloud machines and not managed Kafka. More importantly, they truly understood the internal structure of this component precisely because it wasn't managed at all. When you run something yourself, you understand exactly what is happening under the hood, whereas when someone else runs it for you, you only know what they are willing to tell you.
And when the time came to move, they built on Kubernetes instead of relying on specific tools from a particular vendor. They planned a four-step process beforehand, which stemmed from a deep understanding of the internal structure of the component they wanted to migrate. This wasn't an impulsive move; it was precise planning made possible because the knowledge resided with them, not with an external vendor. The result speaks for itself: they can shift workloads between any vendor, or even their own machines, without rebuilding the entire product. While competitors locked themselves into AWS or GCP services, Reddit remained mobile and had a full understanding of what they were running. They planned ahead, while others just did what looked easiest from above.
The Real Cost of Managed Services
Then there was the argument that if you can't afford an extra $10 million a year, you are already in trouble. I understand that logic, but it is a half-truth; it is worse than a lie. This argument assumes money is cheap and that budget is just a matter of alternatives. But money isn't cheap like it was when the texts underpinning AI tools were written. The real question isn't whether you have $10 million, but what you are buying with that $10 million. I co-founded a product bootstrapped with a few thousand daily users, and there, every expense is measured. Even if you have investor money, it makes sense to operate the same way so you can look in the mirror and say you acted reasonably. Of course, this argument completely flips if your investors have a financial interest in strengthening managed services.
Let's break this down. If you are buying peace of mind, then yes, there are still hiccups with managed services, and you are still on the front lines with your customers and no one is sleeping. A managed service doesn't truly buy you peace; it buys you an illusion of peace, because when a failure hits - and failures always hit - you are dependent on an external vendor's response time while your customers are angry with you.
And the critical question is: Can you buy that same peace by accumulating this knowledge internally? Absolutely. We are talking about the salary of over 40 people annually. There is no way hiring a group of juniors and seniors will cost you more than this per year. With 40 people, you don't just get infrastructure maintenance; you get internal knowledge, precise solution tailoring, the preservation of internal accountability, access to more talent, and additional manpower for other tasks.
If you are buying something else with that $10 million, it is worth asking: Is it possible to buy the same thing much more cheaply?
The Convenience Trap
The convenience of today is the constraint of tomorrow. The pattern repeats itself: a company chooses a managed service 'because it's faster to start.' After a year or two, costs climb, the team doesn't understand what is running under the hood, and then the moment comes when you realize you can't move. Your 'fast' cloud setup today could become your biggest constraint tomorrow.
This isn't just about avoiding vendor dependency. It is about preserving options when business needs change. The market shifts, regulations change, vendors raise prices, and if you built all your infrastructure on a single vendor's tools, you are simply at the mercy of their constraints. Reddit proved that a different path is possible. They proved that investing in internal knowledge and architecture that allows for mobility not only saves money but grants true freedom of movement. The ability to shift workloads between vendors without rebuilding the product is not a privilege reserved for giant companies. It is the result of correct architectural decisions made early on.
Key Principles for Long-Term Architecture
Here are a few principles that emerge from this experience and the discussion that followed: You must enable mobility from day one. Kubernetes and infrastructure you manage yourself give you freedom that a managed service will never grant. The initial investment is larger, but it pays off when the moment comes when you need to move. Know what you are running. When infrastructure is managed, the knowledge stays with the vendor. When you manage it, the knowledge stays with you. Internal knowledge is the asset that allows for smooth transitions, quick troubleshooting, and precise tailoring to your needs.
Do the real math. Don't just compare setup costs. Compare the total cost - including what you lose in flexibility, knowledge, and movement. $10 million a year on managed services is 40 salaries of people who can build something tailored for you and stay with the knowledge inside the organization.
Build something mobile and smart, not what is presented to you as 'convenient.' The convenience of a managed service is dazzling - at first. But as it grows, that convenience becomes a cage. Then you realize the key is held by someone else.
How much of your current architecture is a ticking debt bomb?
Takeaways
- Managed cloud services offer convenience but create vendor lock-in that limits your long-term flexibility and freedom of movement.
- Reddit's successful migration from cloud to self-managed Kubernetes demonstrates that investing in internal infrastructure knowledge from day one pays dividends when business needs change.
- The true cost of managed services extends far beyond setup expenses—factor in lost flexibility, reduced internal knowledge, and constraints on future decisions.
- Building internal expertise with 40 people annually can cost less than $10 million while providing tailored solutions, preserved accountability, and the ability to shift workloads between vendors.
- Architectural decisions made early determine whether your infrastructure remains flexible or becomes a constraint; prioritize mobility and internal knowledge over short-term convenience.